306 lines
9.6 KiB
Bash
306 lines
9.6 KiB
Bash
#!/usr/bin/env bash
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#
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# install_postfix_sendonly.sh v1.0
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# Postfix + OpenDKIM + SPF + DMARC（Send-Only 模式）
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# --------------------------------------------------------
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# ✅ 自动部署轻量级 Postfix 发信服务（仅 587 STARTTLS）
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# ✅ 集成 DKIM 签名、SPF/DMARC/rDNS/HELO 校验模板
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# ✅ 兼容阿里云 / Cloudflare DNS 输出格式
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# ✅ 适配 Ubuntu / Debian / RHEL 系列系统
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# --------------------------------------------------------
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# Author: Pan Haitao @ svc.plus
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#
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set -euo pipefail
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DOMAIN="svc.plus"
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HOSTNAME="smtp.${DOMAIN}"
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SERVER_IP="52.196.108.28"
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EMAIL="no-reply@${DOMAIN}"
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CERT="/etc/ssl/${DOMAIN}.pem"
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KEY="/etc/ssl/${DOMAIN}.key"
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DKIM_SELECTOR="mail"
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DKIM_KEY_DIR="/etc/opendkim/keys/${DOMAIN}"
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TMP_PASS="$(openssl rand -base64 12)"
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ACTION="${1:-help}"
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log(){ echo -e "\033[1;36m$*\033[0m"; }
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die(){ echo "❌ $*"; exit 1; }
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check_root(){ [ "$EUID" -eq 0 ] || die "请用 root 运行"; }
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# ------------------ 应用端配置 ------------------
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show_app_config(){
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cat <<EOF
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📦 应用端 SMTP 配置：
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----------------------------------------------------------
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smtp:
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host: "${HOSTNAME}"
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port: 587
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username: "${EMAIL}"
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password: "${TMP_PASS}"
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from: "XControl Account <${EMAIL}>"
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tls:
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mode: "auto"
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insecureSkipVerify: false
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auth: "login"
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----------------------------------------------------------
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EOF
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echo "首发密码（仅本次显示）：${TMP_PASS}"
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}
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check_send_email(){
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local SMTP_HOST="${HOSTNAME}"
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local SMTP_PORT=587
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local SMTP_USER="${EMAIL}"
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local SMTP_PASS="${TMP_PASS}"
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local TEST_TO="${1:-${EMAIL}}"
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local SUBJECT="📨 SMTP Deliverability Test — $(date '+%Y-%m-%d %H:%M:%S')"
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local BODY="✅ Automated deliverability test from ${SMTP_HOST}
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Environment:
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- HELO: $(hostname -f)
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- Source IP: $(curl -s ifconfig.me 2>/dev/null || echo 'unknown')
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- TLS: STARTTLS on ${SMTP_PORT}
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- Auth: LOGIN (${SMTP_USER})
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If you received this message intact, DKIM/DMARC/SPF validation succeeded."
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echo "🔍 Testing outbound mail via ${SMTP_HOST}:${SMTP_PORT}"
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echo "-------------------------------------------------------------"
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swaks --server "${SMTP_HOST}:${SMTP_PORT}" \
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--tls --protocol ESMTP \
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--auth LOGIN \
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--auth-user "${SMTP_USER}" \
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--auth-password "${SMTP_PASS}" \
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--from "${SMTP_USER}" \
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--to "${TEST_TO}" \
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--header "From: XControl Mail System <${SMTP_USER}>" \
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--header "Subject: ${SUBJECT}" \
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--body "${BODY}" \
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--timeout 15 --quit-after "."
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echo "-------------------------------------------------------------"
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}
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# ------------------ 依赖 ------------------
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ensure_packages(){
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log "📦 安装 Postfix + OpenDKIM..."
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export DEBIAN_FRONTEND=noninteractive
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apt update -qq
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apt install -y postfix opendkim opendkim-tools mailutils swaks dnsutils openssl curl
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}
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# ------------------ SSL ------------------
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verify_cert(){
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if [[ -f "$CERT" && -f "$KEY" ]]; then
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log "🔐 使用自有 SSL 证书：$CERT"
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openssl x509 -noout -subject -dates -in "$CERT" || true
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else
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log "⚠️ 未检测到 ${CERT}/${KEY}，生成自签证书..."
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mkdir -p /etc/ssl
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openssl req -x509 -nodes -newkey rsa:2048 -days 365 \
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-subj "/CN=${HOSTNAME}" -keyout "$KEY" -out "$CERT"
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fi
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}
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# ------------------ DKIM ------------------
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deploy_dkim(){
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log "🔏 配置 OpenDKIM..."
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mkdir -p "${DKIM_KEY_DIR}"
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cd "${DKIM_KEY_DIR}"
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if [ ! -f "${DKIM_SELECTOR}.private" ]; then
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opendkim-genkey -s "${DKIM_SELECTOR}" -d "${DOMAIN}"
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chown opendkim:opendkim "${DKIM_SELECTOR}.private" "${DKIM_SELECTOR}.txt"
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chmod 600 "${DKIM_SELECTOR}.private"
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fi
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cat >/etc/opendkim.conf <<EOF
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Syslog yes
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UMask 002
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Mode sv
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Canonicalization relaxed/simple
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SubDomains no
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KeyTable /etc/opendkim/key.table
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SigningTable /etc/opendkim/signing.table
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ExternalIgnoreList refile:/etc/opendkim/trusted.hosts
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InternalHosts refile:/etc/opendkim/trusted.hosts
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Socket inet:8891@localhost
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UserID opendkim
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EOF
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cat >/etc/opendkim/key.table <<EOF
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${DKIM_SELECTOR}._domainkey.${DOMAIN} ${DOMAIN}:${DKIM_SELECTOR}:${DKIM_KEY_DIR}/${DKIM_SELECTOR}.private
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EOF
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cat >/etc/opendkim/signing.table <<EOF
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*@${DOMAIN} ${DKIM_SELECTOR}._domainkey.${DOMAIN}
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EOF
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cat >/etc/opendkim/trusted.hosts <<EOF
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127.0.0.1
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localhost
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${DOMAIN}
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EOF
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chown -R opendkim:opendkim /etc/opendkim
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systemctl enable --now opendkim
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}
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# ------------------ Postfix ------------------
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deploy_postfix() {
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verify_cert
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log "🚀 配置 Postfix Send-only (仅启用 587 / STARTTLS)..."
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# 确保 postfix 存在
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command -v postconf >/dev/null 2>&1 || die "Postfix 未安装"
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# 主配置（禁用入站、仅发信）
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postconf -e "myhostname = ${HOSTNAME}"
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postconf -e "myorigin = ${DOMAIN}"
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postconf -e "mydestination = "
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postconf -e "relayhost = "
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postconf -e "inet_interfaces = all"
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postconf -e "inet_protocols = all"
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postconf -e "biff = no"
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postconf -e "append_dot_mydomain = no"
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postconf -e "readme_directory = no"
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postconf -e "smtpd_banner = ${HOSTNAME} ESMTP"
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postconf -e "compatibility_level = 2"
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postconf -e "mydomain = ${DOMAIN}"
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postconf -e "smtp_helo_name = ${HOSTNAME}"
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postconf -e "alias_maps = hash:/etc/aliases"
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postconf -e "alias_database = hash:/etc/aliases"
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postconf -e "mynetworks = 127.0.0.0/8 [::1]/128"
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postconf -e "relay_domains = ${DOMAIN}"
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# TLS & DKIM
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postconf -e "smtpd_tls_cert_file = ${CERT}"
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postconf -e "smtpd_tls_key_file = ${KEY}"
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postconf -e "smtpd_tls_security_level = may"
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postconf -e "smtp_tls_security_level = may"
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postconf -e "smtp_use_tls = yes"
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postconf -e "smtp_tls_note_starttls_offer = yes"
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postconf -e "smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt"
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postconf -e "smtpd_tls_auth_only = yes"
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postconf -e "milter_default_action = accept"
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postconf -e "milter_protocol = 6"
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postconf -e "smtpd_milters = inet:localhost:8891"
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postconf -e "non_smtpd_milters = inet:localhost:8891"
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# 禁用 25 端口入站，仅启用 587
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cat >/etc/postfix/master.cf <<EOF
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smtp inet n - y - - smtpd
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# 关闭 25 端口监听
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smtp inet n - n - - reject
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submission inet n - y - - smtpd
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-o syslog_name=postfix/submission
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-o smtpd_tls_security_level=encrypt
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-o smtpd_sasl_auth_enable=no
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-o smtpd_relay_restrictions=permit_mynetworks,reject_unauth_destination
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-o milter_macro_daemon_name=ORIGINATING
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EOF
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systemctl enable --now postfix
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systemctl restart postfix
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sleep 1
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# 验证监听端口
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if ss -tlnp | grep -qE ':587\s'; then
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log "✅ Postfix 已启用并仅监听 587 端口 (STARTTLS Send-Only 模式)"
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else
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die "❌ 端口 587 未成功监听，请检查日志：journalctl -xeu postfix"
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fi
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}
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# ------------------ DNS 模板 ------------------
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show_dns_record(){
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log "🌐 生成 DNS 模板（SPF / DKIM / DMARC / rDNS / HELO）..."
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local DKIM_FILE="${DKIM_KEY_DIR}/${DKIM_SELECTOR}.txt"
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local DKIM_ONE_LINE="<DKIM 公钥未生成>"
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if [[ -f "$DKIM_FILE" ]]; then
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# 读取 DKIM 文件并清理注释、括号、引号和换行
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DKIM_ONE_LINE=$(grep -v '^;' "$DKIM_FILE" \
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| tr -d '\n' \
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| sed -E 's/[()]//g; s/"//g; s/\s+/ /g; s/IN TXT//; s/mail._domainkey.*v=/v=/; s/\s*v=DKIM1/v=DKIM1/' \
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| sed 's/ *$//')
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fi
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echo "----------------------------------------------------------"
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echo "A smtp.${DOMAIN} ${SERVER_IP}"
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echo "MX ${DOMAIN} smtp.${DOMAIN}."
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echo "SPF @ \"v=spf1 a:smtp.${DOMAIN} -all\""
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echo "DKIM ${DKIM_SELECTOR}._domainkey \"${DKIM_ONE_LINE}\""
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echo "DMARC _dmarc \"v=DMARC1; p=none; rua=mailto:postmaster@${DOMAIN}\""
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echo "rDNS (请让 ${SERVER_IP} 反查为 ${HOSTNAME})"
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echo "HELO (EHLO 输出应为 ${HOSTNAME})"
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echo "----------------------------------------------------------"
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}
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# ------------------ 自检 ------------------
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check_self(){
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log "🔍 自检 SPF / DKIM / DMARC / rDNS / 端口 ..."
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echo
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echo "SPF:"; dig +short TXT ${DOMAIN} | grep -i spf || echo "⚠️ 未配置 SPF"; echo
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echo "DKIM:"; dig +short TXT ${DKIM_SELECTOR}._domainkey.${DOMAIN} || echo "⚠️ 未配置 DKIM"; echo
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echo "DMARC:"; dig +short TXT _dmarc.${DOMAIN} || echo "⚠️ 未配置 DMARC"; echo
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echo "rDNS:"; dig +short -x ${SERVER_IP} || echo "⚠️ 未配置反向解析"; echo
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echo "端口监听："; ss -tlnp | grep -E '(:25|:587|:8891)\s' || echo "⚠️ 端口未监听"; echo
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echo "OpenDKIM testkey："; opendkim-testkey -d "${DOMAIN}" -s "${DKIM_SELECTOR}" -vvv || true
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}
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# ------------------ 卸载 ------------------
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uninstall_reset(){
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log "🧹 停止并清理..."
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systemctl stop postfix || true
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systemctl stop opendkim || true
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apt purge -y postfix opendkim opendkim-tools || true
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apt autoremove -y || true
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rm -rf /etc/postfix /etc/opendkim /var/log/mail*
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log "✅ 已清理完成（证书未动）。"
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}
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# ------------------ 主流程 ------------------
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check_root
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case "${ACTION}" in
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deploy)
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ensure_packages
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deploy_dkim
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deploy_postfix
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show_dns_record
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;;
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upgrade)
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log "⬆️ 更新配置并重启..."
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deploy_dkim
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deploy_postfix
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show_dns_record
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;;
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show)
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case "${2:-}" in
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dns_record) show_dns_record ;;
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app_config) show_app_config ;;
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*) echo "用法: $0 show {dns_record|app_config}" ;;
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esac
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;;
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check)
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case "${2:-}" in
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self) check_self ;;
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send_email) check_send_email ;;
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*) echo "用法: $0 check {self|send_email}" ;;
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esac
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;;
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uninstall|reset)
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uninstall_reset
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;;
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help|--help|-h)
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echo "用法: $0 {deploy|upgrade|show {dns_record|app_config}|check {self|send_email}|uninstall}"
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;;
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*)
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echo "用法: $0 {deploy|upgrade|show {dns_record|app_config}|check {self|send_email}|uninstall}"
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;;
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esac
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